Base Grades

Ranging from easy flowing to high-viscosity

VESTAKEEP® PEEK is polycondensed from the building blocks hydrochinone and 4,4´-difluorobenzophenone in a multistage process. The base grades have a melt viscosity of 100–3,000 Pas, measured at 400 °C, and a low shear of 1 sec-1, which is right for injection molding and extrusion applications.